Carboxylic Acid and Acid DerivativesHard

Question

Among the following the stringest acid is

Options

A.CH3COOH
B.C6H5COOH
C.m-CH3OC6COOH
D.P-CH3OC6COOH

Solution

Benzoic acid is the strongest acid. benbzoate ion is stablised by resonance. + I effect of - CH3 or - OCH3 group reduces the possibility of ionisation of H+ from COOH.

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